Official Journal of the Japan Wood Research Society
Table 2 Fire-resistance test results
From: Relative improvements in flame resistance of coir fiberboards treated with fire-retardant solution
Sample | FR boron (wt%) | Flammability (min) | Flame penetration time (min) | Rate of burning (min) | Resistance to flame spread (min) |
|---|---|---|---|---|---|
As per IS 1734: Part 3 (1983) [16] | As per IS 15491: 2004 [14] | ||||
FRCS 1 | 40 | 49.00 | 38.50 | 41.50 | 56.00 |
51.00 | 42.00 | 40.00 | 57.75 | ||
48.00 | 40.00 | 42.00 | 59.00 | ||
FRCS 2 | 35 | 55.00 | 38.00 | 42.25 | 65.00 |
56.00 | 35.50 | 44.00 | 62.00 | ||
50.00 | 39.25 | 46.50 | 59.00 | ||
FRCS 3 | 30 | 52.00 | 40.00 | 47.50 | 65.00 |
54.00 | 38.00 | 49.00 | 67.00 | ||
50.00 | 46.00 | 60.00 | 64.00 | ||
FRCS 4 | 25 | 44.00 | 35.00 | 44.50 | 62.00 |
43.50 | 35.50 | 51.00 | 64.00 | ||
40.00 | 39.00 | 46.50 | 57.00 | ||
FRCS 5 | 20 | 38.00 | 33.00 | 28.00 | 57.50 |
38.50 | 32.50 | 31.00 | 63.50 | ||
35.50 | 36.00 | 27.00 | 55.00 | ||
FRCS 6 | 15 | 30.25 | 30.00 | 26.00 | 57.00 |
26.50 | 30.00 | 26.15 | 55.00 | ||
29.00 | 29.50 | 27.25 | 60.00 | ||
FRCS 7 | 10 | 26.75 | 27.50 | 21.00 | 52.25 |
25.00 | 29.00 | 19.00 | 52.50 | ||
26.00 | 25.75 | 20.00 | 53.50 | ||
Untreated | 0 | 34.00 | 25.00 | 12.00 | 6.00 |
32.50 | 27.00 | 13.00 | 6.00 | ||
35.50 | 29.50 | 11.00 | 6.00 | ||